Pacific Northwest Plant Disease Management Handbook
Printed page URL:
https://pnwhandbooks.org/node/415
Plant Disease
Host and Disease Descriptions
Host and Disease Descriptions
Reviewed: March 2023
Fir, Douglas and True-Stem Decays (Heart Rots)
Rapeseed = Canola (
Brassica napus
and
B. rapa
=
B. campestris
)-Alternaria Black Spot
Apple (
Malus
spp.)-Bull's-eye Rot
Apple (
Malus
spp.)-Diplodia Canker
Arugula (
Eruca sativa
)-Phoma Stem Canker (Black Leg)
Blueberry (
Vaccinium corymbosum
)-Rust
Blueberry (
Vaccinium corymbosum
)-Verticillium Wilt
Broccoli (
Brassica oleracea
)-Powdery Mildew
Brussels sprouts (
Brassica
oleracea
)-Powdery Mildew
Cabbage and Cauliflower (
Brassica oleracea
)-Powdery Mildew
Canna
-Viruses
Crabapple (
Malus
spp.)-Twig Dieback and Canker
Maple (
Acer
spp.)-Armillaria Root Rot
Maple
(
Acer
spp.)-Branch Cankers
Maple (
Acer
spp.)-Phytophthora Root Rot
Maple (
Acer macrophyllum
)-Wood Decay
Mustard Greens (
Brassica juncea
)-Powdery Mildew
Oak (
Quercus
spp.)-Ganoderma Root and Butt Rot
Oak (
Quercus
spp.)-Inonotus Root and Butt Rot
Oak (
Quercus
spp.)-Nectria Canker
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